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Morphology of Barium Titanyl Oxalate Produced by Homogeneous Precipitation from Acidic Solution of Dimethyl Oxalate
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1997, v.10 no.3, pp.203-208
Min,
C., &
Lee,
C.
(1997). Morphology of Barium Titanyl Oxalate Produced by Homogeneous Precipitation from Acidic Solution of Dimethyl Oxalate. Analytical Science and Technology, 10(3), 203-208.
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Abstract
Barium titanyl oxalate(BTO) was precipatated by utilizing the thermal decomposition of dimethyl oxalate in acidic aqueous solution having <TEX>$BaCl_2$</TEX> and <TEX>$TiCl_4$</TEX>. Particle morphology of BTO was influeneced by the various experimental factors. i.e.. the faster rate to nucleation with higher temperature and the higher ratio of [DMO]/[<TEX>$Ba^{2+}+Ti^{4+}$</TEX>] was found to correspond to the faster rate of transformation of particle size distribution from unimodal to broad unimodal through bimodal. The BT powder obtained by calcination at <TEX>$900^{\circ}C$</TEX> in air consists of larger particles than BT generated by general coprecipitation method and shows tetragonal symmetry. The stirring during reaction was also found to have much effect upon characteristics of BTO and BT.
- keywords
- barium titanyl oxalate, morphology, precipitation, dimethyl oxalate
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